Passive Sampling Techniques in Environmental Monitoring, Volume 48 (Comprehensive Analytical Chemistry) (Comprehensive Analytical Chemistry)

Monitoring pollutants in air, soil and water is a routine requirement in the workplace, and in the wider environment. Passive samplers can provide a representative picture of levels of pollutants over a period of time from days to months by measuring the average concentrations to which they have been exposed. Air monitors are widely used, for instance to measure the exposure of workers to volatile compounds, but also for monitoring the fate of pollutants in the atmosphere. Passive sampling devices are now becomining increasingly used to monitor pollutants in rivers, coastal waters and ground water where contamination results from sources such as domestic and industrial discharges, and the use of agrochemicals. Passive Sampling Techniques in Environmental Monitoring provides a timely collection of information on a set of techniques that help monitor the quality of air, surface and ground waters. Passive sampling can provide an inexpensive means of obtaining a representative picture of quality over a period of time, even where levels of pollutants fluctuate due to discontinuous discharges or seasonal application of chemicals such as pesticides. Recent changes in legislation have increased the pressure to obtain better information than that provided by classical infrequent spot sampling.Brought together in one source, this book looks at the performance of a range of devices for the passive sampling of metals, and of non-polar and polar organic chemicals in air and in water. The strengths and weaknesses and the range of applicability of the technology are considered. * Comprehensive review of passive sampling - covering air, water and majority of available technologies in one volume* Chapters written by international specialist experts * Covers theory and applications, providing background information and guidelines for use in the field PassiveSamplingTechniquesin1121_f.jpg......Page 1 1.pdf......Page 2 2.pdf......Page 6 Contents......Page 9 4.pdf......Page 19 5.pdf......Page 22 6.pdf......Page 24 Introduction......Page 26 Calibration in Solid Phase Microextraction......Page 29 Equilibrium extraction......Page 30 Exhaustive extraction......Page 31 Pre-equilibrium extraction......Page 32 Calibration based on first-order reaction rate constant......Page 33 Diffusion......Page 35 Diffusion-based rapid SPME......Page 38 Time-weighted average passive sampling......Page 46 SPME field sampler......Page 51 References......Page 54 Introduction......Page 56 The Context: Why Develop Passive air Sampling Techniques for POPs?......Page 58 What Approaches can be used?......Page 61 The Choice of Sampler Designs: Features, Advantages and Potential Problems......Page 63 Low-capacity sampling: polymer-coated glass......Page 65 Medium-capacity sampling devices: polyurethane foam disks......Page 66 High-capacity sampling devices: semipermeable membrane devices and XAD-2 resin......Page 67 POGs: case studies and applications......Page 69 SPMDs: case studies and applications......Page 70 PUF disks: case studies and applications......Page 72 XAD-2 resin: case studies and applications......Page 74 Future Improvements and Needs for PAS for POPs......Page 75 References......Page 76 The Applicability of Passive Sampling for Chemical Exposure Assessment......Page 80 Passive Sampling, Basic Theory......Page 81 Standards for Evaluation of Passive Samplers......Page 83 Sampler Designs for Passive Sampling-Thermal Desorption Analysis......Page 84 Thermal Desorption......Page 87 Adsorbents......Page 90 Analytical Equipment for Thermal Desorption......Page 92 Applications using Passive Sampling-thermal Desorption-gas Chromatography for Exposure Assessment; Examples and Trends......Page 93 Possible Limitations/Sources of error when using Passive Sampling-Thermal Desorption-Gas Chromatography......Page 95 Self-Assessment of Exposure......Page 97 Selecting a suitable adsorbent for the analytes of interest......Page 99 Minimising artefacts......Page 100 Personal (individual) exposure assessment......Page 101 References......Page 102 Introduction......Page 107 Theory......Page 108 Membrane......Page 110 Design of the Permeation Passive Sampler......Page 113 Determination of the Calibration Constants of Gut Permeation Passive Samplers with Silicone Membranes Based on Physico-chemical Properties of the Analytes......Page 114 Number of carbon atoms......Page 117 Boiling point temperature......Page 118 Linear temperature-programmed retention index system......Page 120 Application of GUT permeation passive samplers in indoor air analysis......Page 125 Conclusion......Page 126 References......Page 127 Introduction......Page 129 Theory......Page 130 Preparation and design of the MESCO samplers......Page 132 Generation of the standard gas mixtures and calibration of the samplers......Page 133 Thermodesorption/GC-MS analysis......Page 136 Laboratory exposure experiments......Page 138 Comparison of the different MESCO types......Page 140 On-site exposure experiments......Page 141 References......Page 144 Introduction......Page 146 Estimating Air Concentrations......Page 147 Environmental Factors......Page 152 Conclusions......Page 154 References......Page 155 Introduction......Page 159 Basic Concepts and Models for SPMDs......Page 160 Model Application to other Passive Samplers......Page 164 Validity of the Model Assumptions......Page 165 Water Boundary Layer Resistance......Page 167 Membrane Resistance......Page 170 Biofouling Layer......Page 174 Other Intermediate Phases......Page 175 Static exposure design......Page 176 Static renewal design......Page 177 Continuous flow design......Page 178 In situ calibration......Page 179 Conclusion and Outlook......Page 180 References......Page 182 Introduction......Page 188 POCIS description and rationale......Page 190 Theory and Modeling......Page 193 Use and processing......Page 199 Data quality consideration......Page 200 Application of POCIS for pharmaceutical monitoring in the United States......Page 202 Comparison of POCIS and traditional sampling for wastewater monitoring......Page 203 Application of POCIS for pesticide monitoring in Denmark......Page 204 Application of POCIS for pharmaceutical monitoring in the United Kingdom......Page 206 Development of the PRC approach in POCIS......Page 209 Determination of sampling rate and kinetic data for chemicals of interest......Page 211 Conclusions......Page 212 References......Page 213 Concept of Chemcatcher......Page 215 Receiving phases......Page 216 Diffusion membranes......Page 217 Reusable sampler body prototype......Page 219 Disposable sampler body prototype......Page 221 Theory......Page 222 Sampling of Hydrophobic Organic Contaminants......Page 223 Calibration data......Page 224 Performance reference compound concept......Page 226 Empirical uptake rate model......Page 227 Estimation of in situ TWA concentrations......Page 228 Integrative sampler......Page 229 Short pollution event detector......Page 231 Sampling of Metals......Page 232 Pan-European field trials to compare the performances of the Chemcatcher and spot sampling in monitoring the quality of river water......Page 233 Monitoring pesticide runoff in Brittany, France......Page 235 Field trial in the River Meuse in The Netherlands......Page 236 Field trial in the estuary of the River Ribble in the United Kingdom......Page 238 Comparison of the Performance of the Chemcatcher with that of other Sampling Devices......Page 239 Acknowledgments......Page 242 References......Page 243 Introduction......Page 246 Passive uptake Model for Mesco Sampler......Page 247 PDMS-coated stir bar enclosed in a dialysis membrane bag (MESCO I)......Page 248 Silicone material enclosed in an LDPE membrane (MESCO II)......Page 249 Laboratory-Derived Sampling Rates of the Various MESCO Formats......Page 250 Sampling site......Page 252 Sampler deployment and retrieval......Page 254 Accumulated amount of water pollutants......Page 255 In situ exchange kinetics from PRC offload......Page 257 Sampling-mode considerations......Page 258 Comparison of MESCO I with SPMD......Page 260 Field trials with MESCO II—first results......Page 261 References......Page 263 Introduction......Page 265 Gel preparation......Page 267 Alternative binding agents......Page 268 DGT principles......Page 270 Potential sources of error when using DGT......Page 271 Elution efficiency......Page 272 Ionic strength......Page 273 Diffusive boundary layer......Page 275 Analytes......Page 277 Kinetics......Page 279 Speciation......Page 280 Bioavailability......Page 285 The use of DGT as a routine monitoring tool......Page 287 Conclusion......Page 288 References......Page 289 Introduction......Page 293 Porosity and inertness......Page 294 Thickness......Page 295 Sorbent material......Page 296 Determination of time-weighted average chemical concentrations......Page 297 Preparation of the ceramic dosimeter for field application......Page 299 Sampling rates......Page 300 Detection limits......Page 301 Long-term stability......Page 303 Example of Field Results and Future Work......Page 304 References......Page 306 Introduction......Page 308 VOCs in ground-water at the ground-water/surface-water interface......Page 312 VOCs in ground-water in monitoring wells......Page 315 Conclusions......Page 319 References......Page 320 Introduction......Page 323 SPMD rationale and applicability......Page 324 Pre-exposure considerations......Page 327 SPMD storage considerations......Page 334 Precautions/procedures during deployment and retrieval of SPMDs......Page 335 Quality Control......Page 337 References......Page 339 Introduction......Page 341 Time-integrated sampling......Page 342 Batch techniques......Page 343 Negligble Cw depletion......Page 344 Batch renewal......Page 345 Partition-controlled delivery......Page 346 Partition-controlled delivery in a flow-through vessel......Page 347 In Situ Methods......Page 350 Pumping systems......Page 351 Sorbents......Page 352 Grab sampling validation methods......Page 353 References......Page 358 Introduction......Page 362 Principles in Soils and Sediments......Page 363 Modelling Interactions of DGT with Soils and Sediments......Page 366 Practicalities for deployments in soils......Page 369 Soil dynamics......Page 370 Biological mimicry......Page 372 Sediments......Page 376 Practicalities for deployments in sediments......Page 377 Analyte distributions from gel slicing......Page 378 Direct measurements of analytes in the binding layer......Page 380 Sources of localised maxima......Page 382 References......Page 383 Introduction......Page 388 Petrex Passive Soil Gas and Sediment Vapour Sampling System......Page 389 GoreTM Modules for Passive Soil Gas Collection......Page 390 Emflux® Passive Soil Gas Sampling System......Page 391 Semipermeable Membrane Devices for Passive Sampling in Sediment Pore-Water......Page 392 Solid-Phase Microextraction Devices for Passive Sampling in Soil and Sediment......Page 393 Conclusion......Page 397 References......Page 398 Introduction......Page 400 Concepts and Examples for Linking Passive Sampling of Groundwater with Toxicological Analysis......Page 401 The toximeter......Page 403 Toxicological analysis of solvent extracts obtained from passive sampling devices......Page 408 Potential Future Approaches......Page 410 References......Page 411 Introduction......Page 413 General......Page 414 Passive samplers......Page 415 Objectives......Page 418 Deployment of mussels......Page 420 Sample processing......Page 422 Deployment of passive samplers......Page 423 QA data......Page 425 Passive sampling, analytical aspects......Page 428 Partition coefficients......Page 430 Mussels......Page 431 Analytical precision of sampling rate......Page 432 Artefacts in sampling rates......Page 434 Results for RS......Page 436 Passive sampling and aqueous concentrations......Page 437 Concentrations in water and mussels......Page 438 Equilibrium or uptake phase......Page 440 BAF values......Page 444 Variability for station and season......Page 445 Variability over time......Page 447 Average BAF values......Page 448 Usefulness of PS in Monitoring......Page 450 GLOSSARY: Compounds short and full names......Page 452 References......Page 453 26.pdf......Page 455 Monitoring pollutants in air, soil and water is a routine requirement in the workplace, and in the wider environment. Passive samplers can provide a representative picture of levels of pollutants over a period of time from days to months by measuring the average concentrations to which they have been exposed. Air monitors are widely used, for instance to measure the exposure of workers to volatile compounds, but also for monitoring the fate of pollutants in the atmosphere. Passive sampling devices are now becomining increasingly used to monitor pollutants in rivers, coastal waters and ground water where contamination results from sources such as domestic and industrial discharges, and the use of agrochemicals.
Passive Sampling Techniques in Environmental Monitoring provides a timely collection of information on a set of techniques that help monitor the quality of air, surface and ground waters. Passive sampling can provide an inexpensive means of obtaining a representative picture of quality over a period of time, even where levels of pollutants fluctuate due to discontinuous discharges or seasonal application of chemicals such as pesticides. Recent changes in legislation have increased the pressure to obtain better information than that provided by classical infrequent spot sampling.
Brought together in one source, this book looks at the performance of a range of devices for the passive sampling of metals, and of non-polar and polar organic chemicals in air and in water. The strengths and weaknesses and the range of applicability of the technology are considered.

* Comprehensive review of passive sampling - covering air, water and majority of available technologies in one volume
* Chapters written by international specialist experts
* Covers theory and applications, providing background information and guidelines for use in the field